Rivet-feeding mechanism



A a-i124. 1928.

E. B. STIMPSON RIVE'I' FEEDING MECHANISM Filed June 9, 1927 z ENTOR BY A TO NEY Patented Apr..2 4, 1928. UNITED STATES EDWIN B. s'rIMPsom or BROOKLYN, NEW YORK, sssmnon. TO EDWIN B.

COMPANY, or BROOKLYN, NEW YORK.

srmrson RIVET-FEEDING MECHANISM. I

Application med June-9; 1927. Serial 1%. 197,652.

This invention relates to rivet feeding mechanism such as used. to feed rivets to the operating plunger of a rivet setting machine.

An object of the invention is to provide mechanism that will feed the rivets smoothly and rapidly without congestion or jamming.

In rivet feeding mechanism now in use the rivet has a tendency to fall over on its side just as it is being fed into the rivet-1e ceiving pocket, and this action causes jamming of themachine. The present invention avoids this difliculty b providing an improved feedway that guides the rivet in such a way that it maintains a positionsubstantially normal to the feedway and hence falls upright into the pocket. This is done by forming the lower end of the feed-way with a part of reduced depth that closely engages the head of the rivet and holds it against tilting movement thereby insuring its proper engagement with the rivetreceiving pocket.

WVhile a preferred form of the invention has been disclosed for purposes of illustration, it should be understood that various changes may be made in the structure without departing from the spirit and scope of the invention as hereinafter set forth and claimed.

In the drawings:

Fig. 1 is a plan view of the lower face of a feedway embodying the invention;

Fig. 2 is a: section on line 2-2 of Fig. 1;

Fig. 3 isan end elevation of the parts shown in Fig. 1;

Fig. 4 is a perspective of the lower end of the feedway.

The device disclosed hereinis an improvementon the structure shown in my Patent No. 1,480,577, issued Jan. 15, 1924. In the patented machine the slot for feeding rivets to the holding pocket is of uniform depth throughout its length, and as it must be deep enough to permit free passage of the rivets under force of gravity, the rivet heads fit so loosely therein that they tend to fall over on their sides just as they are leaving the lower end of the feed slot. In the present inven tion the lower end of the feed slot is of less depth than the main part of the slot, and the rivet head is thus firmly held against tilting as it is being fed to the holding pocket.

Referring to the drawings more particularly, the reference numeral 10 indicates the lower part of the feedway, which is formed with a T-shaped feed slot 11. Anose piece 1.3,which is secured to the lower end of the feedway, is formed at its lower end with a Trshaped delivery slot 14 in a position oil'- set from the feed slot 11, and with across groove 15 for receiving the cut-off slide 16. Plates 17 and 18 are suitably secured to the nose piece and have overhanging flanges 19 and 20 which cooperate to form a continuation of the feed slot 11. These plates 17 and 18 also extend over the groove 15 and help to keep the slide 16 in place.

In this case the main part of the delivery slot is of the same depth as the feed slot, the constricted end of the delivery slot being formed in a separate face plate 19 secured by screws 20 to the end of the nose piece 13. A T-shaped slot 21 is cut through the plate 19', and is of the same general shape as i the delivery slot 14: except that the lateral branches of the slot are constricted toward the outer face of the plate. This is done by forming the lower surfaces of the lateral branches with upward inclines as indicated at 22 in Figs. 2 and 1. This structureis disclosed as being a convenient method of obtaining a delivery slot ofuniform depth except for a constriction at its lower end, but any other mechanical arrangementfor obtaining the same result could be used.

I claim 1. Rivet feeding mechanism including an inclined feedway having a T-shaped feed slot formed therein, a T-shapeddelivery slot offset from the feed slot, the lateral arms of the T-shaped delivery slot being of a uniform depth. throughout a major portion of 1 their length and being constricted near the lower end of the delivery slot, and means for transferring a rivet from the feed slot to the delivery slot.

2. Rivet feeding mechanism including an inclined feedway having a T-shaped feed slot formed therein, a T-shaped delivery slot offset from the feed slot, the lateral arms of the T-shaped delivery slot being of a uniform depth throughout a major portion of their length and being constricted near the lower end of thedelivery slot, and a reciprocating slide for transferring a rivet from the feed slot to the delivery slot.

3. Rivet feeding mechanism including an inclined feedway having a T-shaped feed slot formed therein, a T-shaped delivery slot offset from the feed slot, the lateral arms of the delivery slot being of a uniform depth of the delivery slot being of a uniform depth throughout a major portion of their length, a plate secured to the lower end of 1 the feedway, a T-shaped slot in the plate, the lateral arms of the plate slot being of decreasing depth toward the open end of the slot, and a reciprocating slide for transferring a rivet from the feed slot to the de- 20 livery slot.

In testimony whereof afiix my signature.

EDWIN B. STIMPSO'N. 

